Metal-working machine



J. H. SHEPHERD. METAL WORKING MACHINE.

APPLICATION FILED JULY 10, I918, 1,366,425.

2 SHEETS-SHEET l.

' JHW Patented Jan. 25,1921.

I. H. SHEPHERD. METAL WORKING MACHINE.

. APPLICATION FILED JULY I0, I9I8- 1,366,425. Patented Jan. 25, 1921.

2 SHEETS-SHEET 2.

INVEN TOR ATTORNE JI UNITED STATES PATENT OFFICE.

JOHN H. SHEPHERD, OF ELYRIA, OHIO.

METAL-WORKING LZACHINE.

Application filed July 10, 1918. Serial No. 244,292.

To all whom. it may concern:

Be it known that I, JOHN H. SHEPHERD, a citizen of the United States, residing at Elyria, in the county of Lorain and State of Ohio, have invented certain new and useful Improvements in Metal-Working li ilachines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to metal working machines, employed, for example, in the manufacture of such devices as the float illustrated and described in United States Letters Patent No. 1,230,335, June 19, 1917. It is very important that such structures should possess great rigidity and strength, in order to resist blows and strains delivered to them, and should, at the same time, be light and buoyant. When made of sheet metal it is, therefore, important that such strength and rigidity shall be realized by the structure of the device and the manner in which it is constructed.

I have mentioned this particular structure for the purpose of describing my invention. It will, of course, be apparent that my invention may be employed in the making of any similar structure where such functions as I have named are important.

I aim to produce a machine which will so operate upon the metal as to produce a structure realizing the advantages I have named, and which is of especial advantage in making the devices illustrated in my said former patent.

I also aim to produce a machine which will quickly, cheaply and conveniently perform such functions. I

Other objects of my invention and the invention itself will be better understood from a description of an embodiment of the in vention.

Figure 1 is a top plan view of an embodiment of my invention. 7

Flg. 2 is a side elevation showing a par- .tially made float in position.

Fig. 3 is a sectional view along the line 33 in Fig. 1.

Fig. 4 is a sectional view along the line 44 of Fig. 1.

Fig. 5 is an end elevation looking in the direction of the arrow 5 in Fig. 1.

is here illustrated as made of a casting provided with a longitudinal opening 7. The base is a hollow rectangular member provided with ears 8 through which it may be attached to any supporting means. At 9 and 10 are shown the tool members. As here illustrated, these members are shaped like a hollow cone. While the exterior may be of any suitable shape, it is important that the interior or cavity shall be cone, or approximately cone, shaped. In the embodiment here shown the walls of these cavities, here called the faces of the tool members, are indicated at 11, and are cone-shaped, since it is here desired to produce floats with cone-shaped ends. vided with a plurality of ribs 12, which extend in a direction parallel to the elements of the surface of the cones. In the embodiment shown, the ribs begin at the base of the cone and extend part way to the apex near which they terminate, as indicated at 13, at points equidistant from the apex of the cones. The ribs should be equally spaced apart, and should extend all around the interior of the tool member.

The tool at 9 is preferably formed of two parts, a part 14 consisting of a hollow frustoconical member carrying the ribs 12 and having its edge beveled off, as illustrated at 15 in Figs. 1 and 2. The other part 16 contains a recess 17, which is substantially conical in shape, and whose base is the same area as the opening 141 in the top of the recess in the part 14. The member 16 also contains a cylindrical bore 18, through which the tool member 9 is connected to a movable shaft 22 by any suitable means, such as a set-screw 20 and a slot 21.

In the embodiment shown, the shaft 22 is provided with an annular slot 21, and the set screw 20 passing through a bore 200 in the shank 142 of the part 16 has its end 201 situated in said slot. The set screw is adapted to be driven against and grip said shaft to set the tool member in position in said shaft.

The parts 14 and 16 are fastened together in any suitable manner, such as by screws 23. The part 10 is composed of the part 14, which may be similar to the part 14 of These faces 11 are prothe tool member 9. The second part 16' of the tool member 10 is formed with a conical recess 17 whose base is the same area as the area of the opening in the top of the recess in the part 14:. The part 16 is provided with a cylindrical shaft 25, which is mounted in a cylindrical bore 26 in a supporting member 27. The member 1.6" is movable longitudinally in the bore 26. Means are prov1ded for movmg this member longitudi- -nally, here consisting of a shaft 30 provided with a spiral thread 31, which operates in a bore 82 in the member'27. A. pa1r of lugs "83 are formed in the walls of the bore 32,

performing the function of the female threadsf r The shaft 30 is rotated through an arm 35,

and-the member 17 thereby driven longi- V ably mounted on the bottom of the member 27 to grip the bottom of theflanges 61 and 62. It will thus be seen that the member 27 maybe moved to a desired position on the base and there fastened. Means are provided for bracing this member and the appae ratus carried thereby in the frame, here shown as a rack L0 and a catch 41. The rack 40 is pivoted at 42 to the member .47, so that the rack teethOO engage the catch 41. The rear end 43 of the rack may be lifted when the position of the member is to be changed. It will be seen that these means enable me to quickly change the position of the member 27 and always to brace the same.

The tool 9 and the shaft 22 are mounted in a second frame member50, which ishere shown as provided with two uprights 51 and 52,:ea ch of which is provided with an opening 5 l through which the shaft 22 extends and through whichit is movable longitudinally." Means are provided for moving this shaft longitudinally, here consisting. of a lever'fifl pivotedat 61 to the member 50 and connected through links 62 with a lug 63 secured in turnto the shaft 22 by some such means as a set-screw 64. I prefer to make the member 50 adjustable on the base, for example, in the same manner as the mem ber 27. j

' Means are provided for retaining the mechanism in the position to which it has been moved when thelever 60 has been moved to its farthest right-hand position (referring to Figs. 1 and 2) and in which the float is caught between 9 and 10, while the operation caused by. movement of 35 is being effected. In the embodiment shown I have provided for this purpose adevice 113 pivoted at 114 to the block 63 and which may slide along the topvof 50 and when 60 has reached its farthest right-hand position, drops'down behind 50, so that the end of 113 will engage the side of 50 and lock 60 in such position. .By lifting 113 so as to clear the side of 50, lever 60 is released and can be thrown back.

The operation of the embodiment of my invention illustrated and I described is as follows: The device to be operated on is shown at A and is c nstructed by cutting piece of sheet metal to the desired size, forming the same with the corrugations B and with the'creases C. As will be seen, the

' corrugations are in the central part of the de vice and are perpendicular to the creases C at the ends of the device. The'shcet metal thus creased and corrugated is formed into a cylinder, as illustrated in the drawing, the seam along the edge being closed in any suitable manner.

The device thus formed is placed in the machine with the ribs 12 in the grooves D in the device, as illustrated in Fig. 2; The lever 60 is then moved in the direction of the arrow X, moving the tool member 9 toward the tool member 10, the ribs all, the while running along the grooves D. in theembodiment shown, the ribs following the di rection of the conical cavity, gradually and with pressure uniformly exerted about the periphery of the end of the cylinder, draw the ends of the cylinder together, forming conical parts at the ends. The height of the corrugations of these conical parts is increased as the ends are approached, thus making the floats especially strong at the ends. The conical parts are corrugated-and thus strengthened to resist any blows delivered to them. This operation progresses gradually as'the tool members are brought together. 7

Toward the end of this operation, the ends of the devices A are rammed down into the conical recesses 17 and 17'. It will be seen, however, that owing, to the fact that the ribs do not extend" to the apex of the cone, the ends of the conical sections of the device will pass into the unribbed portions of the conical recesses shown atl'? and 17, thereby preventing the jamming ofthe metal in the machine.

When the ends the corrugations so pass the ends of the ribs, the rooves. D will be of substantially the width of the ribs themselves. If the ribs were continued further, the machine would jam. 7 I When the lever 60 has been moved as far in the direction of the arrow X as possible, the arm 35 is thrown over, moving the mem ber longitudinally, and still further drawing down the end of the devicerhwhich is in the tool .10. When this operation has been completed, the device A is removed and reversed and the other end thereof still furbe closed in some such manner as described 1. In a sheet metal working machine, the

combination of a pair of tool members, each provided with a cone-shaped cavity, longitudinal ribs mounted in said cavities and equally spaced apart therein, said ribs extending clear around the faces of the cavities and beginning adjacent the edges of the mouths of the cavities and extending part way only to the apices thereof, means to mount said tool members with the cavities facing each other, means to move one of said tool members toward the other, a movable device mounted in the apex of one of said cavities, and having a conical recess therein whose base is coincident with the top of one of said cavities and mechanism to move said device toward said cavity.

2. In a machine of the class described, the combination of a pair of tool members, each provided with a cavity therein, means to mount said tool members with the cavities facing each other and means to move one of said tool members toward the other, a device movably mounted at the bottom of one of said cavities and adapted to be moved in the direction of the other tool member, and mechanism to move said device in the direction of the other tool member.

3. In a machine of the class described, the combination of means to engage the bottom of corrugations formed in the end of a cylindrical' sheet metal device and to draw said ends together, thereby increasing the depth of the corrugations so that the depth is greatest at the ends thereof, and mechanism to engage the ends of the corrugations thus formed to still further close the end of the cylinder, thus forming rigid cone-shaped ends to the cylindrical device.

4. In a sheet metal working machine, the combination of a pair of members each provided with a cone-shaped cavity, a plurality of ribs on the face of each of said cavities extending parallel to elements of the sur faces of the cavities, means to mount said members with the cone faces of the cavities facing each other, means to move one of said members toward the other and a device to lock said means in position when so moved.

5. In a machine of the class described, the combination of a pair of members provided with cone-shaped faces oppositely mounted, a plurality of ribs in each face extending along the cone-shaped face thereof and parallel to the elements of the surface thereof,

means to move one of said members toward the other and a device to lock said means in position when so moved.

6. A tool member for compressing the ends of tubular devices, consisting of a die having a conical recess, a supporting member secured to said die having a recess communicating with the end of said conical recess, a second die having a conical recess and slidably positioned in the recess in said supporting member, and means for moving said last mentioned die.

7. A tool member having a die with a conical recess, said die having a plurality of grooves arranged in the surface of said recess, ribbed members in said grooves, a supporting member secured to said die and having a recess communicating with the first-mentioned recess, a second die having a conical recess and adapted to slide in the recess in said supporting member, a screw threaded in said supporting member and bearing against said last mentioned die whereby the second mentioned die is moved by rotating the screw.

8. In machines for closing the ends of tubular devices, tool members having coneshaped cavities, a supporting bed, means for mounting the members on said bed with the base of the cone-shaped cavities toward each other, means for moving one member to compress the ends of a tubular device in said cavities, whereby the said ends are drawn into conical shape, and a die having a conical recess and adapted to slide in one of said members to further compress the.

end of said device.

9. In machines for closing the ends of tubular devices, a tool member having coneshaped cavities, a supporting bed, means for mounting the members on said bed with the base of the cone-shaped cavities toward each other, ribbed members arranged in said conical cavities, means for moving one member to compress the ends of a tubular device in said cavities, whereby the said ends are drawn into conical shape, and a die having a recess and adapted to slide in one of said members to further compress the end of said device.

10. In a machine for closing the ends of tubular devices, tool members having coneshaped cavities, a supporting bed, means for mounting the members on said bed with the base of the cone-shaped cavities toward each other, means for moving one member to compress the ends of a tubular device in said cavities, means f()i l00king said last men tioned member after being moved by said means, a die positioned in the other of said members, and means for moving said die in said member to further compress the end of said device. 10

In Witness whereof I hereunto sign my name this 3rd day of July, 1918.

JOH H. VVSHVEPHERD; 

